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88aa111677
We shouldn't call `__cxa_begin_catch` if built with `-fno-exceptions`, because it's possible that the environment we're in won't include the `__cxa_begin_catch` routine. rdar://122995672
59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
//===--- Exception.cpp - Exception support --------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// Swift doesn't support exception handlers, but might call code that uses
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// exceptions, and when they leak out into Swift code, we want to trap them.
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//
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// To that end, we have our own exception personality routine, which we use
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// to trap exceptions and terminate.
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//
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//===----------------------------------------------------------------------===//
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#if defined(__ELF__) || defined(__APPLE__)
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#include <exception>
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#include <cstdio>
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#include <unwind.h>
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#include "swift/Runtime/Debug.h"
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#include "swift/Runtime/Exception.h"
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using namespace swift;
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extern "C" void __cxa_begin_catch(void *);
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SWIFT_RUNTIME_STDLIB_API _Unwind_Reason_Code
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_swift_exceptionPersonality(int version,
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_Unwind_Action actions,
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uint64_t exceptionClass,
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struct _Unwind_Exception *exceptionObject,
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struct _Unwind_Context *context)
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{
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#if __cpp_exceptions
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// Handle exceptions by catching them and calling std::terminate().
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// This, in turn, will trigger the unhandled exception routine in the
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// C++ runtime.
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__cxa_begin_catch(exceptionObject);
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std::terminate();
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#else
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fatalError(0,
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"C++ exception handling detected but the Swift runtime was "
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"compiled with exceptions disabled\n");
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#endif
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return _URC_FATAL_PHASE1_ERROR;
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}
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#endif /* defined(__ELF__) || defined(__APPLE__) */
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